now, she does battle with the tyrant known as simon cowell. twice a week, her show, "the x factor," airs wednesday and thursday nights on fox. please welcome demi lovato. ♪ [ cheers and applause ] how are you doing? >> i'm fantastic. >> jimmy: i have to say i think you're doing a great job on the x-factor", you really are. didn't know what to expect. >> i think you're doing a great job on "the jimmy kimmel show." >> jimmy: i appreciate that. when you're young and sometimes they pull some kid in, a pop star, they just say nice things over and over again and you don't. not only do you not -- [ laughter ] well, no, i think you're judging thej honestly, nothing worse than when everybody says something nice about everyone whether they're good or not, that's a boring show if that happens and you seem to be driving simon crazy. >> it's pretty amazing that i get the privilege to get paid to mess with my boss all day. >> jimmy: you really do. he is your boss. did you sit down with an interview with him? >> i didn't. i never really met him, he called